Makefile: autobuild dependency rules

[ps-cgit] / Makefile

diff --git a/Makefile b/Makefile
index d1950cb2efec549f62463a0c2f6eaf88972d93f8..faf7b98ae8b658af4af1a6b3326f7af6a95ef45f 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -13,6 +13,13 @@ GIT_URL = http://www.kernel.org/pub/software/scm/git/git-$(GIT_VER).tar.bz2
 -include cgit.conf
 
 
+#
+# Define a pattern rule for automatic dependency building
+#
+%.d: %.c
+       $(CC) $(CFLAGS) -MM $< | sed -e 's/\($*\)\.o:/\1.o $@:/g' >$@
+
+
 EXTLIBS = git/libgit.a git/xdiff/lib.a -lz -lcrypto
 OBJECTS =
 OBJECTS += cache.o
@@ -61,6 +68,8 @@ cgit: $(OBJECTS)
 
 $(OBJECTS): git/xdiff/lib.a git/libgit.a VERSION
 
+-include $(OBJECTS:.o=.d)
+
 git/xdiff/lib.a: | git
 
 git/libgit.a: | git
@@ -84,7 +93,7 @@ uninstall:
        rm -f $(CGIT_SCRIPT_PATH)/cgit.png
 
 clean:
-       rm -f cgit VERSION *.o
+       rm -f cgit VERSION *.o *.d
        cd git && $(MAKE) clean
 
 distclean: clean